Ralph Lauren quietly shuttered its two-year-old 20,000-square-foot store last week. Other brands are expected to close boutiques in a city that has lost its luster for cash-rich mainland Chinese tourists.

GETTING COZY: DKNY’s popular cozy may be worn in multiple ways. Those wishing to find out the tricks behind the piece now can get their personal stylist to help them with the look. The brand just launched a DKNY Cozy iPhone application, which offers ideas on how to wear the item of clothing through features such as step-by-step visual directions on how to style the wrap and an instructional video.

“We wanted to give the personal-stylist experience to clients using technology that is available today,” said Patti Cohen, Donna Karan International’s executive vice president of global marketing and communications. “Not only is it more environmentally friendly and cost effective, but the cozy app is always accessible and much more comprehensible than a printed guide.”

The app was created with Atimi Software Inc., which also developed the Donna Karan iPhone application.

BERGE’S BOOK FOR YVES: Pierre Bergé, the longtime companion and business partner of late couturier Yves Saint Laurent, is pouring his heart out in a new book. Bergé has penned “Letters to Yves,” which will be published by Editions Gallimard in February. The entrepreneur said Tuesday the 125-page French-language tome contains no photos, only text, and was written between Christmas — about six months after the designer died of brain cancer at age 71 — and August.

DEFENDING LOHAN: Emanuel Ungaro chief executive officer Mounir Moufarrige dismissed rumors that Lindsay Lohan is on her way out as the label’s “artistic adviser.”

“As we speak, she is in New York in shoots with Ungaro,” he said, amid speculation Ungaro chairman Asim Abdullah was fed up with the controversy and overheated publicity surrounding Lohan. “I totally deny it,” Moufarrige said, referring to a New York Post report Friday that Abdullah wanted to terminate Lohan’s contract after the tabloid sensation’s debut collection — in partnership with Spanish designer Estrella Archs — was mauled by critics in October.

Speaking on the sidelines of a luxury conference in Milan, Moufarrige conceded the decision to appoint Lohan was “controversial, but then fashion is controversial anyway, and you need some novelties and you need to test some new ideas.” He added that Lohan, whom he described as a “walking, talking advertisement,” was helping to raise Ungaro’s profile and widen the brand’s appeal to a younger audience.

“There are some girls out there that whenever they move, whatever they wear, they attract attention, even if they make mistakes. It’s all publicity,” Moufarrige said. “We’ve got a celebrity and it’s a new concept, which we’re going ahead with.” Underscoring the point, Moufarrige said Ungaro’s sales in its own stores had “improved” since Lohan’s appointment, even though the starlet’s collection had not yet hit the shelves.

“[Ungaro], let’s recognize it, was a dormant brand, and now everybody’s talking about it today, so the level of awareness has improved greatly,” he added.

COSTUME CHANGE: While accessories aficionados await the first fruits from Camille Miceli in her new role as the artistic director of Christian Dior’s costume jewelry lines, the style maven’s former employer, Louis Vuitton, is said to have tapped her replacement. Word has it former Marc Jacobs collaborator Clare Corrigan will fill Miceli’s shoes as Vuitton’s costume jewelry designer. The British accessories designer worked for four years on Jacobs’ signature runway jewelry, as well as his home collection, before going on to launch her own modern jewelry line, Nusch, last year.

STELLA LIGHTS UP: It’s something of a tradition for Stella McCartney to have Brit comedians turn on the Christmas lights at her Bruton Street boutique in London: In the past, stars of “Little Britain” and Peter Kay have done the honors — and this year it was the turn of surreal act The Mighty Boosh. Dressed as Gothic grannies in nylon dresses, gray wigs and black eyeliner — a getup they described as “Stella’s new collection,” — the five-piece cast, fronted by Noel Fielding and Julian Barratt, played a few of the rock numbers from their offbeat BBC television show to a crowd gathered on the street in front of the store.

McCartney danced along at the side of the stage, joined by guests including her husband, Alasdhair Willis; sister, Mary McCartney; Twiggy, and Dinos and Tiphaine Chapman, before the band switched on the store’s window display, which featured an illuminated Santa, reindeer and holly. Later, guests piled inside the store to sip Champagne and nibble on candy canes. McCartney admitted she asked Fielding and Barratt to perform “because we like their outfits — they’ve got good fashion sense.” And while it might have been a raucous start to Christmas for McCartney, she said she would spend the actual holiday in a more low-key fashion “hanging out with the family at home.”

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@rebeccaminkoff is bringing self-checkout to high fashion: The brand has partnered with @queuehop to bring its customers self-checkout options, beginning this holiday season at its SoHo store. (📷: @aurorarosephoto)